Seiko 9R31 Movement Details
Seiko caliber 9R31 is a high grade Spring Drive (hand winding) watch movement. Production started around 2019.
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| Sub-brands: | Grand Seiko |
| Power reserve: | 72 hours |
| Accuracy: | ±15 seconds/month |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| Number of jewels: | 30 |
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